Yamaha XV1700PCRC Service Manual page 488

• Is the spark plug in good condition, is it of
the correct type, and is its gap within spec-
ification?
YES
EAS00743
4. Ignition spark gap
The following procedure applies to all of the
spark plugs.
• Disconnect the spark plug cap from the
spark plug.
• Connect the ignition checker 1 as shown.
2 Spark plug cap
• Set the main switch to "ON".
• Measure the ignition spark gap a.
• Crank the engine by pushing the starter
switch and gradually increase the spark
gap until a misfire occurs.
Minimum ignition spark gap
6 mm (0.24 in)
• Is there a spark and is the spark gap within
specification?
YES
NO
Re-gap or replace
the spark plug.
NO
The ignition system
is OK.
7 - 18
IGNITION SYSTEM
EAS00745
5. Spark plug cap resistance
The following procedure applies to all of the
spark plug caps.
• Remove the spark plug cap from the spark
plug lead.
• Connect the pocket tester ("Ω × 1k") to the
spark plug cap as shown.
• Measure the spark plug cap resistance.
Spark plug cap resistance
10 kΩ at 20 °C (68 °F)
• Is the spark plug cap OK?
YES
– +
ELEC
NO
Replace the spark
plug cap.